1st tank fill, I got 37.5 MPG in mixed city, suburban, highway driving. About 50% was highway and about 20% city. And I wasn't really doing anything special to get better mileage. I drove it pretty much the same as my old 2000 supercharged Pontiac Bonneville which averaged 22 MPG.

But the savings are nice. Switching from premium to regular gas and also getting approx 70% improvement in MPG. And 0 to 60 only about 1/2 sec slower.